Foot Valve vs Check Valve for Wells | SCWS

Understanding the difference between foot valves and check valves helps you maintain your well system properly. Learn which valve your system uses, how they differ, and when each type is appropriate.

Foot Valves Explained

Foot valves serve jet pump systems where the pump sits above ground and must pull water up through a suction pipe. The foot valve mounts at the bottom of this pipe, underwater, combining a check valve with a screen filter. The screen keeps debris out while the valve keeps the suction line full of water so the pump can maintain prime.

Check Valves in Submersible Systems

Submersible pumps push water up from below, so they don't need to maintain suction prime. Instead, check valves prevent the column of water in the drop pipe from draining back when the pump stops. This keeps your pressure tank charged and reduces the work the pump must do on each startup cycle.

When Each Type Is Appropriate

Foot valves are exclusive to jet pump systems and shallow wells (typically under 100 feet). Submersible systems always use check valves, with multiple valves recommended for deep wells to reduce the pressure on any single valve. Some older systems may have been converted—if you're unsure what you have, a well inspection can clarify.

Common Problems and Solutions

Foot valve issues usually involve debris clogging the screen or the valve failing to seal, causing loss of prime. Check valve problems typically manifest as slow pressure recovery or excessive pump cycling. Both types eventually wear out and need replacement—foot valves are more accessible but require the pump to lose prime during service.

Frequently Asked Questions